id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
|---|---|---|---|---|---|---|
gr-qc/9403016 | Discrete Self-Similiarity and Critical Point Behavior in Fluctuations
About Extremal Black Holes | The issues of scaling symmetry and critical point behavior are studied for
fluctuations about extremal charged black holes. We consider the scattering and
capture of the spherically symmetric mode of a charged, massive test field on
the background spacetime of a black hole with charge $Q$ and mass $M$. The
spacetime ge... | 1994-03-09 | 2013-11-13 | [
"gr-qc"
] | Jennie Traschen |
gr-qc/9403015 | Particle creation in a colliding plane wave spacetime: wave packet
quantization | We use wave packet mode quantization to compute the creation of massless
scalar quantum particles in a colliding plane wave spacetime. The background
spacetime represents the collision of two gravitational shock waves followed by
trailing gravitational radiation which focus into a Killing-Cauchy horizon. The
use of wav... | 1994-03-09 | 2009-10-22 | [
"gr-qc"
] | Miquel Dorca, Enric Verdaguer |
gr-qc/9403014 | Minimal Closed Set of Observables in the Theory of Cosmological
Perturbations | The theory of perturbation of Friedman-Robertson-Walker (FRW) cosmology is
analysed exclusively in terms of observable quantities. Although this can be a
very complete and general procedure we limit our presentation here to the case
of irrotational perturbations for simplicity. We show that the electric part of
Weyl co... | 1994-03-07 | 2009-10-22 | [
"gr-qc"
] | M. Novello, J. M. Salim, M. C. Motta da Silva, S. E. Joras and R.
Klippert |
gr-qc/9403012 | The Gauss Map and 2+1 Gravity | We prove that the Gauss map of a surface of constant mean curvature embedded
in Minkowski space is harmonic. This fact will then be used to study 2+1
gravity for surfaces of genus higher than one. By considering the energy of the
Gauss map, a canonical transform between the ADM reduced variables and holonomy
variables ... | 1994-03-04 | 2010-04-06 | [
"gr-qc"
] | Raymond S. Puzio |
gr-qc/9403013 | A Non-singular Theory of Gravity | We present a geometrical gravitational theory which reduces to Einstein's
theory for weak gravitational potentials and which has a singularity-free
analog of the Schwarzschild metric. | 1994-03-04 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Neil J. Cornish and John W. Moffat |
gr-qc/9403011 | Dynamics of Apparent and Event Horizons | The dynamics of apparent and event horizons of various black hole spacetimes,
including those containing distorted, rotating and colliding black holes, are
studied. We have developed a powerful and efficient new method for locating the
event horizon, making possible the study of both types of horizons in numerical
rela... | 1994-03-03 | 2009-10-22 | [
"gr-qc"
] | Peter Anninos, David Bernstein, Steven Brandt, Joseph Libson, Joan
Masso, Edward Seidel, Larry Smarr, Wai-Mo Suen, Paul Walker |
gr-qc/9403004 | The Impossibility of Steady-State Inflation | Inflation is known to be generically eternal to the future: the false vacuum
is thermalized in some regions of space, while inflation continues in other
regions. Here, we address the question of whether inflation can also be eternal
to the past. We argue that such a steady-state picture is impossible and,
therefore, th... | 1994-03-02 | 2007-05-23 | [
"gr-qc"
] | Arvind Borde and Alexander Vilenkin |
gr-qc/9403007 | Theory of Local Times II. Another formulation and examples | The model of a stationary universe and the notion of local times presented in
[10] are reviewed with some alternative formulation of the consistent
unification of the Riemannian and Euclidean geometries of general relativity
and quantum mechanics. The method of unification adopted in the present paper
is by constructin... | 1994-03-02 | 2008-02-03 | [
"gr-qc",
"astro-ph",
"hep-th"
] | Hitoshi Kitada |
gr-qc/9403005 | A Spinor Model for Quantum Cosmology | The question of the interpretation of Wheeler-DeWitt solutions in the context
of cosmological models is addressed by implementing the Hamiltonian constraint
as a spinor wave equation in minisuperspace. We offer a relative probability
interpretation based on a non-closed vector current in this space and a
prescription f... | 1994-03-02 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | T Dereli, M Onder, R W Tucker |
gr-qc/9403009 | The isolation of gravitational instantons: Flat tori V flat R^4 | The role of topology in the perturbative solution of the Euclidean Einstein
equations about flat instantons is examined. | 1994-03-02 | 2009-10-22 | [
"gr-qc"
] | Jemal Guven |
gr-qc/9403006 | On the Relation between Classical and Quantum Cosmology in a
2-Dimensional Dilaton-Gravity Model | We analyse the classical and quantum theory of a scalar field interacting
with gravitation in two dimensions. We describe a class of analytic solutions
to the Wheeler-DeWitt equation from which we are able to synthesise states that
give prominence to a set of classical cosmologies. These states relate in a
remarkable w... | 1994-03-02 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | M Onder, R W Tucker |
gr-qc/9403010 | Approaches to Quantum Cosmology | Different proposals for the wave function of the universe are analyzed, with
an emphasis on various forms of the tunneling proposal. The issues discussed
include the equivalence of the Lorentzian path integral and outgoing-wave
proposals, the definitions of the outgoing waves and of superspace boundaries,
topology chan... | 1994-03-02 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | Alexander Vilenkin |
gr-qc/9403008 | Quantum gravity and minimum length | The existence of a fundamental scale, a lower bound to any output of a
position measurement, seems to be a model-independent feature of quantum
gravity. In fact, different approaches to this theory lead to this result. The
key ingredients for the appearance of this minimum length are quantum
mechanics, special relativi... | 1994-03-02 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Luis J. Garay |
gr-qc/9403002 | Gravity and Yang-Mills Theory: Two Faces of the Same Theory? | We introduce a gauge and diffeomorphism invariant theory on the Yang-Mills
phase space. The theory is well defined for an arbitrary gauge group with an
invariant bilinear form, it contains only first class constraints, and the
spacetime metric has a simple form in terms of the phase space variables. With
gauge group $S... | 1994-03-01 | 2009-10-22 | [
"gr-qc"
] | Subenoy Chakraborty and Peter Peldan |
gr-qc/9403001 | Adjointness Relations as a Criterion for Choosing an Inner Product | This is a contribution to the forthcoming book "Canonical Gravity: {}From
Classical to Quantum" edited by J. Ehlers and H. Friedrich. Ashtekar's
criterion for choosing an inner product in the quantisation of constrained
systems is discussed. An erroneous claim in a previous paper is corrected and a
cautionary example i... | 1994-03-01 | 2009-10-22 | [
"gr-qc"
] | Alan D. Rendall |
gr-qc/9403003 | Geometrodynamics of Schwarzschild Black Holes | The curvature coordinates $T,R$ of a Schwarz\-schild spacetime are turned
into canonical coordinates $T(r), {\sf R}(r)$ on the phase space of spherically
symmetric black holes. The entire dynamical content of the Hamiltonian theory
is reduced to the constraints requiring that the momenta $P_{T}(r), P_{\sf
R}(r)$ vanish... | 1994-03-01 | 2014-11-17 | [
"gr-qc"
] | Karel V. Kucha\v{r} |
gr-qc/9402045 | Instability of Gravitating Sphalerons | We prove the instability of the gravitating regular sphaleron solutions of
the $SU(2)$ Einstein-Yang-Mills-Higgs system with a Higgs doublet, by studying
the frequency spectrum of a class of radial perturbations. With the help of a
variational principle we show that there exist always unstable modes. Our
method has the... | 1994-02-28 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | P. Boschung, O. Brodbeck, F. Moser, N. Straumann and M. Volkov |
gr-qc/9402044 | Axisymmetric Stationary Solutions as Harmonic Maps | We present a method for generating exact solutions of Einstein equations in
vacuum using harmonic maps, when the spacetime possesses two commutating
Killing vectors. This method consists in writing the axisymmetric stationry
Einstein equations in vacuum as a harmonic map which belongs to the group
SL(2,R), and decompos... | 1994-02-26 | 2009-10-22 | [
"gr-qc"
] | Tonatiuh Matos and Jerzy Plebanski |
gr-qc/9402043 | No Quantum Super-Minisuperspace with $\Lambda \ne 0$ | We show that the quantum super-minisuperspace of N=1 supergravity with
$\Lambda \ne 0 $ has no non-trivial physical states for class A Bianchi models.
Hence, in super quantum cosmology, the vanishing of $\Lambda$ is a condition
for the existence of the universe. We argue that this result implies that in
full supergravi... | 1994-02-24 | 2009-10-22 | [
"gr-qc"
] | Riccardo Capovilla and Octavio Obregon |
gr-qc/9402042 | Post-Newtonian Expansion of the Ingoing-Wave Regge-Wheeler Function | We present a method of post-Newtonian expansion to solve the homogeneous
Regge-Wheeler equation which describes gravitational waves on the Schwarzschild
spacetime. The advantage of our method is that it allows a systematic iterative
analysis of the solution. Then we obtain the Regge-Wheeler function which is
purely ing... | 1994-02-24 | 2009-10-09 | [
"gr-qc"
] | Misao Sasaki |
gr-qc/9402041 | Observation of critical phenomena and self-similarity in the
gravitational collapse of radiation fluid | We observe critical phenomena in spherical collapse of radiation fluid. A
sequence of spacetimes $\cal{S}[\eta]$ is numerically computed, containing
models ($\eta\ll 1$) that adiabatically disperse and models ($\eta\gg 1$) that
form a black hole. Near the critical point ($\eta_c$), evolutions develop a
self-similar reg... | 1994-02-23 | 2009-10-22 | [
"gr-qc"
] | Charles R. Evans and Jason S. Coleman |
gr-qc/9402040 | Evolution of Topological Defects During Inflation | Topological defects can be formed during inflation by phase transitions as
well as by quantum nucleation. We study the effect of the expansion of the
Universe on the internal structure of the defects. We look for stationary
solutions to the field equations, i.e. solutions that depend only on the proper
distance from th... | 1994-02-22 | 2010-11-01 | [
"gr-qc"
] | R. Basu and A. Vilenkin |
gr-qc/9402039 | Colliding Black Holes: The Close Limit | The problem of the mutual attraction and joining of two black holes is of
importance as both a source of gravitational waves and as a testbed of
numerical relativity. If the holes start out close enough that they are
initially surrounded by a common horizon, the problem can be viewed as a
perturbation of a single black... | 1994-02-22 | 2010-11-01 | [
"gr-qc",
"astro-ph"
] | Richard H. Price and Jorge Pullin |
gr-qc/9402029 | The Gauge Theory of the de-Sitter Group and Ashtekar Formulation | By adding the Pontrjagin topological invariant to the gauge theory of the de
Sitter group proposed by MacDowell and Mansouri we obtain an action quadratic
in the field-strengths, of the Chern-Simons type, from which the Ashtekar
formulation is derived. | 1994-02-22 | 2010-01-06 | [
"gr-qc"
] | J.A. Nieto, O. Obreg\'on and J. Socorro |
gr-qc/9402038 | A Gravitational Lens need not produce an Odd Number of Images | Given any space-time $M$ without singularities and any event $O$, there is a
natural continuous mapping $f$ of a two dimensional sphere into any space-like
slice $T$ not containing $O$. The set of future null geodesics (or the set of
past null geodesics) forms a 2-sphere $S^2$ and the map $f$ sends a point in
$S^2$ to ... | 1994-02-21 | 2015-06-25 | [
"gr-qc"
] | Daniel H. Gottlieb |
gr-qc/9402036 | Arrow of time in a recollapsing quantum universe | We show that the Wheeler-DeWitt equation with a consistent boundary condition
is only compatible with an arrow of time that formally reverses in a
recollapsing universe. Consistency of these opposite arrows is facilitated by
quantum effects in the region of the classical turning point. Since
gravitational time dilation... | 1994-02-21 | 2009-10-22 | [
"gr-qc"
] | C. Kiefer and H. D. Zeh |
gr-qc/9402037 | Horizon Operator Approach to Black Hole Quantization | The $S$-matrix Ansatz for the construction of a quantum theory of black holes
is further exploited. We first note that treating the metric tensor $g_{\m\n}$
as an operator rather than a background allows us to use a setting where
information is not lost. But then we also observe that the 'trans-Planckian'
particles (pa... | 1994-02-21 | 2007-05-23 | [
"gr-qc"
] | G. 't Hooft |
gr-qc/9402035 | Dimension on Discrete Spaces | In this paper we develop some combinatorial models for continuous spaces. In
this spirit we study the approximations of continuous spaces by graphs,
molecular spaces and coordinate matrices. We define the dimension on a discrete
space by means of axioms, and the axioms are based on an obvious geometrical
background. Th... | 1994-02-19 | 2009-10-22 | [
"gr-qc",
"astro-ph",
"hep-lat",
"hep-th"
] | Alexander V. Evako |
gr-qc/9402031 | A SCHR\"Odinger Equation for Mini Universes | We discuss how to fix the gauge in the canonical treatment of Lagrangians,
with finite number of degrees of freedom, endowed with time reparametrization
invariance. The motion can then be described by an effective Hamiltonian acting
on the gauge shell canonical space. The system is then suited for quantization.
We appl... | 1994-02-17 | 2014-11-17 | [
"gr-qc",
"astro-ph",
"hep-th"
] | Marco Cavagli\`a, Vittorio de Alfaro and Alexandre T. Filippov |
gr-qc/9402032 | "No Hair" Theorems -- Folklore, Conjectures, Results | Various assumptions underlying the uniqueness theorems for black holes are
discussed. Some new results are described, and various unsatisfactory features
of the present theory are stressed. | 1994-02-17 | 2011-07-19 | [
"gr-qc"
] | Piotr T. Chrusciel |
gr-qc/9402034 | Is the Exponential of the Chern-Simons Action a Normalizable Physical
State? | We determine the wavefunction that corresponds to the exponential of the
Chern-Simons action in a family of gravitational models provided with
cosmological constant whose non-perturbative canonical quantization is
completely known. We show that this wavefunction does not represent a proper
quantum state, because it is ... | 1994-02-17 | 2010-04-06 | [
"gr-qc"
] | Guillermo A. Mena Marugan |
gr-qc/9402033 | Conformally Invariant Cosmology Based on Riemann-Cartan Spacetime | Conformally invariant GUT-like model including gravity based on Riemann -
Cartan space-time $U_4$ is considered. Cosmological scenario that follows from
the model is discussed and standard quantum gravitational formalism in the
Arnowitt-Deser-Misner form is developed. General formalism is then illustrated
on Bianchi-IX... | 1994-02-17 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | Yuri V. Shtanov (Brown University) and Sergei A. Yushchenko
(Bogolyubov Institute, Kiev) |
gr-qc/9402030 | The Boulware State and the Generalised Second Law of Thermodynamics | We show that the appropriate vacuum state for the interior of a box with
reflecting walls being lowered adiabatically into a Schwarzschild black hole is
the Boulware state. This is concordant with the results of Unruh and Wald, who
used a different approach to obtain the stress-energy inside the box. Some
comments abou... | 1994-02-15 | 2009-10-22 | [
"gr-qc"
] | Warren G. Anderson |
gr-qc/9402028 | Hamiltonian quantization of General Relativity with the change of
signature | We show in this article how the usual hamiltonian formalism of General
Relativity should be modified in order to allow the inclusion of the Euclidean
classical solutions of Einstein's equations. We study the effect that the
dynamical change of signature has on the superspace and we prove that it
induces a passage of th... | 1994-02-15 | 2010-11-01 | [
"gr-qc"
] | Jerome Martin |
gr-qc/9402026 | Decoherence produces coherent states: an explicit proof for harmonic
chains | We study the behavior of infinite systems of coupled harmonic oscillators as
t->infinity, and generalize the Central Limit Theorem (CLT) to show that their
reduced Wigner distributions become Gaussian under quite general conditions.
This shows that generalized coherent states tend to be produced naturally. A
sufficient... | 1994-02-14 | 2009-10-22 | [
"gr-qc"
] | Max Tegmark & Harold S. Shapiro |
gr-qc/9402027 | Fractal basins and chaotic trajectories in multi-black hole space-times | We investigate the phase-space for trajectories in multi-black hole
spacetimes. We find that complete, chaotic geodesics are well described by
Lyapunov exponents, and that the attractor basin boundary scales as a fractal
in a diffeomorphism invariant manner. | 1994-02-14 | 2009-12-30 | [
"gr-qc"
] | N. J. Cornish, C. P. Dettmann and N. E. Frankel |
gr-qc/9402025 | Super-Minisuperspace and New Variables | We consider the specialization to spatially homogenous solutions of the
Jacobson formulation of N=1 canonical supergravity in terms of Ashtekar's new
variables.
We find that the classical Poisson algebra of the supersymmetry constraints
is preserved by this specialization only for Bianchi type A models. The
quantiz... | 1994-02-11 | 2010-04-06 | [
"gr-qc"
] | Riccardo Capovilla and Jemal Guven |
gr-qc/9402024 | Event horizons and apparent horizons in spherically symmetric geometries | Spherical configurations that are very massive must be surrounded by apparent
horizons. These in turn, when placed outside a collapsing body, have a fixed
area and must propagate outward with a velocity equal to the velocity of
radially outgoing photons. That proves, within the framework of the (1+3)
formalism and with... | 1994-02-11 | 2014-11-17 | [
"gr-qc"
] | Edward Malec (Physics Department, UCC, Cork, Ireland and Institute of
Physics, UJ 30-059 Cracow, Reymonta) |
gr-qc/9402022 | Generality of Inflation in a Planar Universe | We study a generality of an inflationary scenario by integrating the Einstein
equations numerically in a plane-symmetric spacetime. We consider the
inhomogeneous spacetimes due to (i) localized gravitational waves with a
positive cosmological constant $\Lambda$, and (ii) an inhomogeneous inflaton
field $\Phi$ with a po... | 1994-02-10 | 2009-10-22 | [
"gr-qc"
] | Hisa-aki SHINKAI and Kei-ichi MAEDA |
gr-qc/9402023 | Does scalar field collapse produce `zero mass' black holes? | An exact one parameter ($\alpha$) family of solutions representing scalar
field collapse is presented. These solutions exhibit a type of critical
behaviour which has been discussed by Choptuik. The three possible evolutions
are outlined. For supercritical evolution (when black holes form) I show that a
quantity related... | 1994-02-10 | 2009-09-25 | [
"gr-qc"
] | Patrick R. Brady |
gr-qc/9402019 | Observables for spacetimes with two Killing field symmetries | The Einstein equations for spacetimes with two commuting spacelike Killing
field symmetries are studied from a Hamiltonian point of view. The complexified
Ashtekar canonical variables are used, and the symmetry reduction is performed
directly in the Hamiltonian theory. The reduced system corresponds to the field
equati... | 1994-02-09 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | Viqar Husain |
gr-qc/9402021 | Exact solution for scalar field collapse | We give an exact spherically symmetric solution for the Einstein-scalar field
system. The solution may be interpreted as an inhomogeneous dynamical scalar
field cosmology. The spacetime has a timelike conformal Killing vector field
and is asymptotically conformally flat. It also has black or white hole-like
regions con... | 1994-02-09 | 2010-11-01 | [
"gr-qc"
] | Viqar Husain, Erik A. Martinez, Dario Nunez |
gr-qc/9402020 | Self-dual gravity and the chiral model | The self-dual Einstein equation (SDE) is shown to be equivalent to the two
dimensional chiral model, with gauge group chosen as the group of area
preserving diffeomorphisms of a two dimensional surface. The approach given
here leads to an analog of the Plebanski equations for general self-dual
metrics, and to a natural... | 1994-02-09 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Viqar Husain |
gr-qc/9402018 | Cosmological Histories for the New Variables | Histories and measures for quantum cosmology are investigated through a
quantization of the Bianchi IX cosmology using path integral techniques. The
result, derived in the context of Ashtekar variables, is compared with earlier
work. A non-trivial correction to the measure is found, which may dominate the
classical pot... | 1994-02-08 | 2009-10-22 | [
"gr-qc"
] | Seth Major and Lee Smolin |
gr-qc/9402016 | Gravitating Solitons and Hairy Black Holes | A brief review of recent research on soliton and black hole solutions of
Einstein's equations with nonlinear field sources is presented and some open
questions are pointed out. | 1994-02-08 | 2016-08-14 | [
"gr-qc",
"hep-th"
] | Piotr Bizo\'n |
gr-qc/9402017 | Critical Behavior of Black Hole Formation in a Scalar Wave Collapse | We present a self-similar model of spherically symmetric collapse of a
massless scalar field with a parameter $p$. The black hole formation is
explicitly shown to occur only in the strong-field implosion of $p >1$. The
field evolution in the critical limit $ p \rightarrow 1 $ is compared with
numerical results found by... | 1994-02-08 | 2010-11-19 | [
"gr-qc"
] | Y.Oshiro, K.Nakamura and A.Tomimatsu |
gr-qc/9402015 | Conformal Transformations of the Wigner Function and Solutions of the
Quantum Corrected Vlasov Equation | We study conformal properties of the quantum kinetic equations in curved
spacetime. A transformation law for the covariant Wigner function under
conformal transformations of a spacetime is derived by using the formalism of
tangent bundles. The conformal invariance of the quantum corrected Vlasov
equation is proven. Thi... | 1994-02-07 | 2010-04-06 | [
"gr-qc"
] | Oleg A. Fonarev |
gr-qc/9402014 | Gravitational Waves from Mergin Compact Binaries: How Accurately Can One
Extract the Binary's Parameters from the Inspiral Waveform? | The most promising source of gravitational waves for the planned detectors
LIGO and VIRGO are merging compact binaries, i.e., neutron star/neutron star
(NS/NS), neutron star/black hole (NS/BH), and black hole/black-hole (BH/BH)
binaries. We investigate how accurately the distance to the source and the
masses and spins ... | 1994-02-04 | 2009-12-30 | [
"gr-qc",
"astro-ph"
] | Curt Cutler and Eanna Flanagan |
gr-qc/9402013 | Multi-Black-Holes in Three Dimensions | We construct time-dependent multi-centre solutions to three-dimensional
general relativity with zero or negative cosmological constant. These solutions
correspond to dynamical systems of freely falling black holes and conical
singularities, with a multiply connected spacetime topology. Stationary
multi-black-hole solut... | 1994-02-04 | 2009-12-30 | [
"gr-qc",
"hep-th"
] | G\'erard Cl\'ement |
gr-qc/9402012 | Metric-Affine Gauge Theory of Gravity: Field Equations, Noether
Identities, World Spinors, and Breaking of Dilation Invariance | In Einstein's gravitational theory, the spacetime is Riemannian, that is, it
has vanishing torsion and vanishing nonmetricity (covariant derivative of the
metric). In the gauging of the general affine group ${A}(4,R)$ and of its
subgroup ${GL}(4,R)$ in four dimensions, energy--momentum and hypermomentum
currents of mat... | 1994-02-04 | 2008-11-26 | [
"gr-qc",
"hep-th"
] | F.W. Hehl, J.D. McCrea, E.W. Mielke, Y. Ne'eman |
gr-qc/9402009 | Thermal states in Anti-de Sitter space-time and the role of time-like
infinity | The grand-canonical thermodynamic potential for Bose and Fermi fields in
anti-de Sitter space-time is introduced and a Mellin complex representation is
given. This is used to investigate the high temperature properties of the
thermal state at finite charge. The time-like nature of spatial infinity is
shown to act as a ... | 1994-02-03 | 2010-11-01 | [
"gr-qc"
] | L. Vanzo and G. Turco |
gr-qc/9402010 | On the physical meaning of Fermi coordinates | (Some Latex problems should be removed in this version) Fermi coordinates
(FC) are supposed to be the natural extension of Cartesian coordinates for an
arbitrary moving observer in curved space-time. Since their construction cannot
be done on the whole space and even not in the whole past of the observer we
examine whi... | 1994-02-03 | 2009-10-22 | [
"gr-qc"
] | Karl-Peter Marzlin |
gr-qc/9402011 | Preferred Observables, Predictability, Classicality, and the
Environment-Induced Decoherence | Selection of the preferred classical set of states in the process of
decoherence -- so important for cosmological considerations -- is discussed
with an emphasis on the role of information loss and entropy. {\it Persistence
of correlations} between the observables of two systems (for instance, a record
and a state of a... | 1994-02-03 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Wojciech H. Zurek |
gr-qc/9402006 | Decoherence, Chaos, and the Second Law | We investigate implications of decoherence for quantum systems which are
classically chaotic. We show that, in open systems, the rate of von Neumann
entropy production quickly reaches an asymptotic value which is: (i)
independent of the system-environment coupling, (ii) dictated by the dynamics
of the system, and (iii)... | 1994-02-02 | 2011-08-04 | [
"gr-qc",
"hep-th"
] | Wojciech Hubert Zurek and Juan Pablo Paz |
gr-qc/9402004 | Regge calculus and Ashtekar variables | Spacetime discretized in simplexes, as proposed in the pioneer work of Regge,
is described in terms of selfdual variables. In particular, we elucidate the
"kinematic" structure of the initial value problem, in which 3--space is
divided into flat tetrahedra, paying particular attention to the role played by
the reality ... | 1994-02-02 | 2010-04-06 | [
"gr-qc"
] | Giorgio Immirzi |
gr-qc/9402007 | Decoherence in Quantum Brownian Motion | We examine the dependence of decoherence on the spectral density of the
environment as well as on the initial state of the system. We use two simple
examples to illustrate some important effects. The simplest derivation of the
general form of the master equation for a general quantum Brownian motion is
outlined in an A... | 1994-02-02 | 2007-05-23 | [
"gr-qc",
"hep-th"
] | Juan Pablo Paz |
gr-qc/9402005 | Two dimensional Sen connections and quasi-local energy-momentum | The recently constructed two dimensional Sen connection is applied in the
problem of quasi-local energy-momentum in general relativity. First it is shown
that, because of one of the two 2 dimensional Sen--Witten identities, Penrose's
quasi-local charge integral can be expressed as a Nester--Witten integral.Then,
to fin... | 1994-02-02 | 2010-04-06 | [
"gr-qc"
] | L.B. Szabados |
gr-qc/9402008 | 5D Schwarzschild-Like Spacetimes with Arbitrary Magnetic Field | We find a new class of exact solutions of the five-dimensional Einstein
equations whose corresponding four-dimensional spacetime possesses a
Schwarzschild-like behavior. The electromagnetic potential depends on a
harmonic function and can be choosen to be of a monopole, dipole, etc. field.
The solutions are asymptotica... | 1994-02-02 | 2009-10-22 | [
"gr-qc"
] | Tonatiuh Matos |
gr-qc/9402002 | MATTERS OF GRAVITY, a newsletter for the gravity community, Number 3 | Table of contents
Editorial
Correspondents
Gravity News:
Open Letter to gravitational physicists, Beverly Berger
A Missouri relativist in King Gustav's Court, Clifford Will
Gary Horowitz wins the Xanthopoulos award, Abhay Ashtekar
Research briefs:
Gamma-ray bursts and their possible cosmological implica... | 1994-02-01 | 2007-05-23 | [
"gr-qc",
"astro-ph"
] | Jorge Pullin (Editor) |
gr-qc/9402001 | Two dimensional Sen connections in general relativity | The two dimensional version of the Sen connection for spinors and tensors on
spacelike 2-surfaces is constructed. A complex metric $\gamma_{AB}$ on the spin
spaces is found which characterizes both the algebraic and extrinsic
geometrical properties of the 2-surface $\$ $. The curvature of the two
dimensional Sen operat... | 1994-02-01 | 2010-04-06 | [
"gr-qc"
] | L.B. Szabados |
gr-qc/9402003 | Running Coupling Constants, Newtonian Potential and non localities in
the Effective Action | We consider a quantum scalar field on an arbitrary gravitational background.
We obtain the effective {\it in-in} equations for the gravitational fields
using a covariant and non-local approximation for the effective action proposed
by Vilkovisky and collaborators. {}From these equations, we compute the quantum
correcti... | 1994-01-31 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | D.A.R. Dalvit and F.D. Mazzitelli |
gr-qc/9401033 | Multiple Field Scalar-Tensor Theories of Gravity and Cosmology | We consider multiple scalar fields coupled to gravity, with special attention
given to two-field theories. First, the conditions necessary for these theories
to meet solar system tests are given. Next, we investigate the cosmological
evolution of the fields to see if these conditions can be met. Solutions are
found in ... | 1994-01-28 | 2010-11-01 | [
"gr-qc"
] | Andrew L. Berkin and Ronald W. Hellings |
gr-qc/9401032 | Spherically Symmetric Gravity as a Completely Integrable System | It is shown - in Ashtekar's canonical framework of General Relativity - that
spherically symmetric (Schwarzschild) gravity in 4 dimensional space-time
constitutes a finite dimensional completely integrable system. Canonically
conjugate observables for asymptotically flat space-times are masses as action
variables and -... | 1994-01-27 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | H.A. Kastrup and T. Thiemann |
gr-qc/9401030 | Stochastic Dynamics of Coarse-Grained Quantum Fields in Inflationary
Universe | It is shown how coarse-graining of quantum field ^M theory in de Sitter space
leads to the emergence of a classical ^M stochastic description as an effective
theory in the infra-red regime. ^M The quantum state of the coarse-grained
scalar field is found to be a highly^M squeezed coherent state, whose center
performs a... | 1994-01-26 | 2009-10-22 | [
"gr-qc"
] | Milan Mijic |
gr-qc/9401024 | Exact Conformal Scalar Field Cosmologies | New exact solutions of Einstein's gravity coupled to a self-interacting
conformal scalar field are derived in this work. Our approach extends a
solution-generating technique originally introduced by Bekenstein for massless
conformal scalar fields. Solutions are obtained for a
Friedmann-Robertson-Walker geometry both fo... | 1994-01-25 | 2010-04-06 | [
"gr-qc"
] | Jo\~ao P. Abreu, Paulo Crawford and Jos\'e P. Mimoso |
gr-qc/9401027 | Black Holes as Quantum Membranes | We propose a quantum description of black holes. The degrees of freedom to be
quantized are identified with the microscopic degrees of freedom of the
horizon, and their dynamics is governed by the action of the relatistic bosonic
membrane in $D=4$. We find that a consistent and plausible description emerges,
both at th... | 1994-01-25 | 2008-11-26 | [
"gr-qc",
"hep-th"
] | Michele Maggiore |
gr-qc/9401031 | Squeezing and Dual Recycling in Laser Interferometric Gravitational Wave
Detectors | We calculate the response of an ideal Michelson interferometer incorporating
both dual recycling and squeezed light to gravitational waves. The photon
counting noise has contributions from the light which is sent in through the
input ports as well as the vacuum modes at sideband frequencies generated by
the gravitation... | 1994-01-25 | 2009-10-22 | [
"gr-qc"
] | Biplab Bhawal and Vijay Chickarmane |
gr-qc/9401025 | Geodesic Structure of the 2 + 1 Black Hole | Null and timelike geodesics around a 2+1 black hole are determined. Complete
geodesics of both types exist in the rotating black-hole background, but not in
the spinless case. Upper and lower bounds for the radial size of the orbits are
given in all cases and the possibility of passing from one black hole exterior
spac... | 1994-01-25 | 2010-04-06 | [
"gr-qc"
] | Norman Cruz, Cristi\'an Mart\'inez and Leda Pe\~na |
gr-qc/9401026 | Relaxed Bounds on the Dilaton Mass in a String Cosmology Scenario | We discuss bounds on the dilaton mass, following from the cosmological
amplification of the quantum fluctuations of the dilaton background, under the
assumption that such fluctuations are dominant with respect to the classical
background oscillations. We show that if the fluctuation spectrum grows with
the frequency th... | 1994-01-25 | 2009-10-22 | [
"gr-qc",
"astro-ph",
"hep-th"
] | M. Gasperini |
gr-qc/9401028 | Towards a unification of gravity and Yang-Mills theory | We introduce a gauge and diffeomorphism invariant theory on Yang-Mills phase
space. The theory is well defined for an arbitrary gauge group with an
invariant bilinear form, it contains only first class constraints, and the
spacetime metric has a simple form in terms of the phase space variables. With
gauge group $SO(3,... | 1994-01-25 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | Subenoy Chakraborty and Peter Peldan |
gr-qc/9401029 | Quantum Gravity on a Circle and the Diffeomorphism Invariance of the
Schrodinger Equation | We study a model for quantum gravity on a circle in which the notion of a
classical metric tensor is replaced by a quantum metric with an inhomogeneous
transformation law under diffeomorphisms. This transformation law corresponds
to the co--adjoint action of the Virasoro algebra, and resembles that of the
connection in... | 1994-01-25 | 2010-04-06 | [
"gr-qc",
"hep-th"
] | R.J. Henderson and S.G. Rajeev |
gr-qc/9401021 | Homotopy Invariants and Time Evolution in (2+1)-Dimensional Gravity | We establish the relation between the ISO(2,1) homotopy invariants and the
polygon representation of (2+1)-dimensional gravity. The polygon closure
conditions, together with the SO(2,1) cycle conditions, are equivalent to the
ISO(2,1) cycle conditions for the representa- tions of the fundamental group in
ISO(2,1). Also... | 1994-01-20 | 2009-10-22 | [
"gr-qc"
] | H. Waelbroeck and F. Zertuche |
gr-qc/9401022 | Canonical Quantization of (2+1)-Dimensional Gravity | We consider the quantum dynamics of both open and closed two- dimensional
universes with ``wormholes'' and particles. The wave function is given as a sum
of freely propagating amplitudes, emitted from a network of mapping class
images of the initial state. Interference between these amplitudes gives
non-trivial scatter... | 1994-01-20 | 2009-10-22 | [
"gr-qc"
] | H. Waelbroeck |
gr-qc/9401023 | On the existence of singularity-free solutions in quartic gravity | We study a general field theory of a scalar field coupled to gravitation
through a quadratic Gauss-Bonnet term $\xi({\phi})$$R_{GB}^2$. We show that,
under mild assumptions about the function $\xi(\phi)$, the classical solutions
in a spatially flat FRW background include singularity - free solutions. | 1994-01-20 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | J.Rizos and K. Tamvakis |
gr-qc/9401019 | Instability of Einstein-Yang-Mills Solitons for Arbitrary Gauge Groups | We prove that static, spherically symmetric, asymptotically flat, regular
solutions of the Einstein-Yang-Mills equations are unstable for arbitrary gauge
groups. The proof involves the following main steps. First, we show that the
frequency spectrum of a class of radial perturbations is determined by a
coupled system o... | 1994-01-19 | 2010-11-01 | [
"gr-qc"
] | O. Brodbeck and N. Straumann |
gr-qc/9401020 | Energy Fluctuations Generated by Inflation | The energy density correlation function $C(x,y)=<\rho(x)\rho(y)>-<\rho>^2$
and its Fourier transform generated by the gravitational tidal forces of the
inflationary de Sitter expansion are derived for a massless or light ($m<<H$)
neutral scalar field $\Phi$ without self--interactions, minimally coupled to
gravity. The ... | 1994-01-19 | 2007-05-23 | [
"gr-qc"
] | Harald F. Muller and Christoph Schmid |
gr-qc/9401018 | Nonsymmetric Gravity Does Have Acceptable Global Asymptotics | ``Reports of my death are greatly exaggerated''
- Mark Twain. We consider the claim by Damour, Deser and McCarthy that
nonsymmetric gravity theory has unacceptable global asymptotics. We explain why
this claim is incorrect. | 1994-01-18 | 2008-02-03 | [
"gr-qc"
] | N. J. Cornish and J. W. Moffat |
gr-qc/9401016 | How to calculate a decoherence matrix numerically and the microscopic
mechanism for decoherence in the Caldeira-Leggett model | A central object in the interpretation of quantum mechanics of closed systems
with decoherent histories is the decoherence matrix. But only for a very small
number of models one is able to give explicit expressions for its elements. So
numerical methods are required. Unfortunately the dimensions of this matrices
are us... | 1994-01-17 | 2008-02-03 | [
"gr-qc"
] | Hans-J\"urgen Pohle |
gr-qc/9401014 | Trapped surfaces and the Penrose inequality in spherically symmetric
geometries | We demonstrate that the Penrose inequality is valid for spherically symmetric
geometries even when the horizon is immersed in matter. The matter field need
not be at rest. The only restriction is that the source satisfies the weak
energy condition outside the horizon. No restrictions are placed on the matter
inside the... | 1994-01-17 | 2009-10-22 | [
"gr-qc"
] | Edward Malec and Niall \'O Murchadha |
gr-qc/9401015 | On the dynamics of generators of Cauchy horizons | We discuss various features of the dynamical system determined by the flow of
null geodesic generators of Cauchy horizons. Several examples with non--trivial
(``chaotic'', ``strange attractors'', etc.) global behaviour are constructed.
Those examples are relevant to the ``chronology protection conjecture'', and
they sh... | 1994-01-17 | 2007-05-23 | [
"gr-qc"
] | P.T. Chrusciel, J. Isenberg |
gr-qc/9401017 | Wilson Loops and Black Holes in 2+1 Dimensions | In 2+1 dimensional Chern-Simons gravity, Wilson loops in the three
dimensional Anti de Sitter group, $SO(2,2)$, reproduce the spinning black hole
of Ba\~nados, Teitelboim and Zanelli (BTZ) by naturally duplicating the
necessary identification of points of a four dimensional globally $SO(2,2)$
invariant space in which t... | 1994-01-17 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Cenalo Vaz and Louis Witten |
gr-qc/9401013 | A Perturbative Method to solve fourth-order Gravity Field Equations | We develop a method for solving the field equations of a quadratic
gravitational theory coupled to matter. The quadratic terms are written as a
function of the matter stress tensor and its derivatives in such a way to have,
order by order, a set of Einstein field equations with an effective
$T_{\mu\nu}$. We study the c... | 1994-01-15 | 2009-10-22 | [
"gr-qc",
"astro-ph",
"hep-th"
] | M.Campanelli, C.O.Lousto and J.Audretsch |
gr-qc/9401011 | Fermions in Quantum Gravity | We study the quantum fermions+gravity system, that is, the gravitational
counterpart of QED. We start from the standard Einstein-Weyl theory,
reformulated in terms of Ashtekar variables; and we construct its non-
perturbative quantum theory by extending the loop representation of general
relativity. We construct the fe... | 1994-01-13 | 2009-10-22 | [
"gr-qc"
] | H A Marales-Tecotl and C Rovelli |
gr-qc/9401010 | Entropy generation in 2+1-dimensional Gravity | The tunneling approach, for entropy generation in quantum gravity, is shown
to be valid when applied to 3-D general relativity. The entropy of de Sitter
and Reissner-Nordstr\"om external event horizons and of the 3-D black hole
obtained by Ba\~nados et. al. is rederived from tunneling of the metric to
these spacetimes.... | 1994-01-11 | 2010-11-01 | [
"gr-qc",
"hep-th"
] | Francois Englert and Benni Reznik |
gr-qc/9401007 | Does a domain wall emit gravitational waves? -- General-relativistic
perturbative treatment | The behavior of gravitational wave perturbations on a locally Minkowskian
spacetime background containing a planar domain wall is investigated in the
gauge-invariant general relativistic framework. It is shown that for this
particular background the domain wall does not emit gravitational waves
spontaneously by its fre... | 1994-01-10 | 2010-11-01 | [
"gr-qc"
] | Hideo Kodama, Hideki Ishihara and Yoshihisa Fujiwara |
gr-qc/9401009 | 5D Axisymmetric Stationary Solutions as Harmonic Maps | We present the complete scheme of the application of the one-and two
dimensional subspace and subgroups method to five-dimensional gravity with a
$G_{3}$ group of motion. We do so in the space time and in the potential space
formalisms. From this method one obtains the Kramer, Belinsky-Ruffini,
Dobiasch-Maison, Cl\'{e}... | 1994-01-10 | 2010-11-01 | [
"gr-qc"
] | Tonatiuh Matos |
gr-qc/9401006 | Steady states of harmonic oscillator chains and shortcomings of harmonic
heat baths | We study properties of steady states (states with time-independent density
operators) of systems of coupled harmonic oscillators. Formulas are derived
showing how adiabatic change of the Hamiltonian transforms one steady state
into another. It is shown that for infinite systems, sudden change of the
Hamiltonian also te... | 1994-01-09 | 2009-10-22 | [
"gr-qc"
] | Max Tegmark & Leehwa Yeh |
gr-qc/9401008 | Stationary Solutions in 2+1 Dimensional Gravity and Closed Time-Like
Curves | We apply the reduced radial gauge to give the general solution of the metric
in 2+1 dimensions in term of quadratures. It allows a complete controll on the
support of the source. We use the result to prove that for a general stationary
universe, conical at infinity, the weak energy condition and the absence of CTC
at s... | 1994-01-08 | 2007-05-23 | [
"gr-qc"
] | P. Menotti and D. Seminara |
gr-qc/9401003 | Quantum Mechanics as Quantum Measure Theory | The additivity of classical probabilities is only the first in a hierarchy of
possible sum-rules, each of which implies its successor. The first and most
restrictive sum-rule of the hierarchy yields measure-theory in the Kolmogorov
sense, which physically is appropriate for the description of stochastic
processes such ... | 1994-01-07 | 2009-10-22 | [
"gr-qc",
"hep-th"
] | Rafael D. Sorkin |
gr-qc/9401005 | Geometrical Constraints on the Cosmological Constant | The cosmological constant problem is examined under the assumption that the
extrinsic curvature of the space-time contributes to the vacuum. A compensation
mechanism based on a variable cosmological term is proposed. Under a suitable
hypothesis on the behavior of the extrinsic curvature, we find that an
initially large... | 1994-01-07 | 2009-09-25 | [
"gr-qc"
] | M.D. Maia and G.S. Silva (Universidade de Brasilia and NASA/Fermilab
Astrophysics Center. Batavia, IL) |
gr-qc/9401004 | Ashtekar's New Variables and Positive Energy | We discuss earlier unsuccessful attempts to formulate a positive
gravitational energy proof in terms of the New Variables of Ashtekar. We also
point out the difficulties of a Witten spinor type proof. We then use the
special orthonormal frame gauge conditions to obtain a locally positive
expression for the New Variable... | 1994-01-07 | 2010-04-06 | [
"gr-qc"
] | James M. Nester, Roh-Suan Tung and Yuan Zhong Zhang |
gr-qc/9401002 | Another positivity proof and gravitational energy localizations | Two locally positive expressions for the gravitational Hamiltonian, one using
4-spinors the other special orthonormal frames, are reviewed. A new quadratic
3-spinor-curvature identity is used to obtain another positive expression for
the Hamiltonian and thereby a localization of gravitational energy and positive
energy... | 1994-01-07 | 2010-11-01 | [
"gr-qc"
] | James M. Nester and Roh-Suan Tung |
gr-qc/9401001 | Gauge Theory of Quantum Gravity | A gauge theory of quantum gravity is formulated, in which an internal, field
dependent metric is introduced which non-linearly realizes the gauge fields on
the non-compact group $SL(2,C)$, while linearly realizing them on $SU(2)$.
Einstein's $SL(2,C)$ invariant theory of gravity emerges at low energies, since
the extra... | 1994-01-04 | 2007-05-23 | [
"gr-qc"
] | J. W. Moffat |
hep-ex/9412018 | A Technique for Directly Measuring the Gravitational Acceleration of
Antihydrogen | The gravitational force on antimatter has never been directly measured. A
method is suggested for measuring the acceleration of antimatter $(\bar g)$ by
measuring the deflection of a beam of neutral antihydrogen atoms in the Earth's
gravitational field. While a simple position measurement of the beam could be
used, a m... | 1994-12-30 | 2007-05-23 | [
"hep-ex",
"gr-qc"
] | Thomas J. Phillips (Physics Department, Duke University Durham, NC,
USA) |
hep-ex/9412015 | Measurement of inclusive particle spectra and test of MLLA prediction in
$e^+e^-$ annihilation at $\sqrt{s}$=58GeV | Inclusive momentum spectra are measured for all charged particles and for
each of $\pi^{\pm}$, $K^{\pm}$, $K^0/\bar{K^0}$, and $p/\bar{p}$ in hadronic
events produced via $e^+e^-$ annihilation at $\sqrt{s}$=58GeV . The measured
spectra are compared with QCD predictions based on the modified leading log
approximation(ML... | 1994-12-27 | 2010-11-01 | [
"hep-ex"
] | R. Itoh, et al. (TOPAZ Collaboration) |
hep-ex/9412016 | Measurement of W and Z Production Cross-sections in p-pbar Collisions at
Sqrt(s)=1.8 TeV | The cross sections for W and Z production in p-pbar collisions at sqrt(s)=1.8
TeV are measured using the D0 detector at the Fermilab Tevatron collider. The
detected final states are W->e nu, Z->ee, W->mu nu, and Z->mu mu. In the ratio
of these measurements, many common sources of systematic error cancel and we
measure ... | 1994-12-27 | 2019-08-14 | [
"hep-ex"
] | Paul Z. Quintas (Fermi National Accelerator Lab) (for the D0
Collaboration) |
hep-ex/9412017 | Measurement of the Bs Meson Lifetime | The lifetime of the $B_s$ meson is measured using the semileptonic decay $B_s
\to D_s^- \ell^+ \nu X$. The data sample consists of 19.3 pb$^{-1}$ of $p
\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV collected by the CDF detector at
the Fermilab Tevatron collider during 1992-1993. There are $76 \pm 8$ $\ell^{+}
D_s^{-}$ si... | 1994-12-27 | 2012-08-27 | [
"hep-ex"
] | The CDF Collaboration |
hep-ex/9412014 | $B$ Meson Lifetimes at CDF | Measurements of the $B_u$, $B_d$, and $B_s$ meson lifetime using semileptonic
$B_u \rightarrow e \nu D^0 X, B_d \rightarrow e \nu D^* X, B_s \rightarrow l
\nu D_s X$ events and exclusive $B_u \rightarrow \psi^{(\prime)} K^{(*)}, B_d
\rightarrow \psi^{(\prime)} K^{(*)}_{(s)}, B_s \rightarrow \psi \phi$ events
are presen... | 1994-12-23 | 2019-08-14 | [
"hep-ex"
] | J. Skarha (for the CDF Collaboration) |
hep-ex/9412013 | J/psi,psi(2S) to mu+ mu- and B to J/psi,psi(2S) Cross Sections | This paper presents a measurement of J/psi,psi(2S) differential cross
sections in p-pbar collisions at square root s = 1.8 TeV. The cross sections
are measured above 4 GeV/c in the central region (|eta| < 0.6) using the dimuon
decay channel. The fraction of events from B decays is measured, and used to
calculate b quar... | 1994-12-23 | 2012-08-27 | [
"hep-ex"
] | The CDF Collaboration |
hep-ex/9412012 | Measurement of the forward-backward asymmetries for charm- and
bottom-quark pair productions at $<\sqrt{s}>$=58GeV with electron tagging | We have measured, with electron tagging, the forward-backward asymmetries of
charm- and bottom-quark pair productions at $<\sqrt{s} >$=58.01GeV, based on
23,783 hadronic events selected from a data sample of 197pb$^{-1}$ taken with
the TOPAZ detector at TRISTAN. The measured forward-backward asymmetries are
$A_{FB}^c =... | 1994-12-19 | 2010-11-01 | [
"hep-ex"
] | E. Nakano, et al. (TOPAZ collaboration) |
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